def create_contract(db, block, tx, msg):
if len(msg.sender) == 40: # Sender is contract.
sender = binascii.unhexlify(msg.sender)
else: # Sender is regular address.
sender = script.base58_check_decode(msg.sender, config.ADDRESSVERSION)
if tx.sender != msg.sender:
block.increment_nonce(msg.sender)
nonce = utils.encode_int(block.get_nonce(msg.sender) - 1)
# msg.to = utils.sha3(rlp.encode([sender, nonce]))[12:].encode('hex')
msg.to = utils.contract_sha3(rlp.encode([sender, nonce]))
assert not block.get_code(msg.to)
res, gas, dat = apply_msg(db, block, tx, msg, msg.data)
if res:
cursor = db.cursor()
bindings = {'contract_id': msg.to, 'tx_index': tx.tx_index, 'tx_hash': tx.tx_hash, 'block_index': block.number, 'source': tx.sender, 'code': bytes(dat), 'nonce': nonce}
sql = '''INSERT INTO contracts VALUES (:contract_id, :tx_index, :tx_hash, :block_index, :source, :code, :nonce)'''
cursor.execute(sql, bindings)
return msg.to, gas, dat
else:
if tx.sender != msg.sender:
block.decrement_nonce(msg.sender)
block.del_account(msg.to)
return res, gas, dat
def get_monosig_script(address):
# Construct script.
pubkeyhash = script.base58_check_decode(address, config.ADDRESSVERSION)
tx_script = OP_DUP # OP_DUP
tx_script += OP_HASH160 # OP_HASH160
tx_script += op_push(20) # Push 0x14 bytes
tx_script += pubkeyhash # pubKeyHash
tx_script += OP_EQUALVERIFY # OP_EQUALVERIFY
tx_script += OP_CHECKSIG # OP_CHECKSIG
return tx_script
def get_address(scriptpubkey):
pubkeyhash = get_pubkeyhash(scriptpubkey)
if not pubkeyhash:
return False
pubkeyhash = binascii.hexlify(pubkeyhash).decode('utf-8')
address = script.base58_check_encode(pubkeyhash, config.ADDRESSVERSION)
# Test decoding of address.
if address != config.UNSPENDABLE and binascii.unhexlify(bytes(pubkeyhash, 'utf-8')) != script.base58_check_decode(address, config.ADDRESSVERSION):
return False
return address
